lkml.org 
[lkml]   [2018]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v2 0/2] kvm "fake DAX" device
On Fri, Oct 12, 2018 at 10:00 PM Pankaj Gupta <pagupta@redhat.com> wrote:
>
> This patch series has implementation for "fake DAX".
> "fake DAX" is fake persistent memory(nvdimm) in guest
> which allows to bypass the guest page cache. This also
> implements a VIRTIO based asynchronous flush mechanism.

Can we stop calling this 'fake DAX', because it isn't 'DAX' and it's
starting to confuse people. This enabling is effectively a
host-page-cache-passthrough mechanism not DAX. Let's call the whole
approach virtio-pmem, and leave DAX out of the name to hopefully
prevent people from wondering why some DAX features are disabled with
this driver. For example MAP_SYNC is not compatible with this
approach.

Additional enabling is need to disable MAP_SYNC in the presence of a
virtio-pmem device. See the rough proposal here:

https://lkml.org/lkml/2018/4/25/756

\
 
 \ /
  Last update: 2018-10-13 18:06    [W:0.079 / U:1.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site